Electrochemical deposition of iridium(IV) oxide from alkaline solutions of iridium(III) oxide

被引：125
作者：
Baur, JE [1 ]
Spaine, TW [1 ]
机构：
[1] Illinois State Univ, Dept Chem, Normal, IL 61790 USA
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 1998年 / 443卷 / 02期
关键词：
electrodeposition; iridium oxide; hydrous oxide; glassy carbon electrode; pH electrode;
D O I：
10.1016/S0022-0728(97)00532-9
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
Cyclic voltammetry is used to deposit films of hydrous iridium oxide onto glassy carbon electrodes from a basic solution of saturated iridium(III) oxide. An acidic solution of Ir(OH2)(2)Cl-4(-) is first prepared from either IrCl63- or IrCl62-. When this solution is made basic, iridium(IV) oxide is deposited by oxygen generated from oxidation of hydroxide. A strongly adherent, bright blue deposit of iridium oxide is formed after 10 to 20 scans between -0.3 and + 1.0 V vs. Ag/AgCl. The modified electrodes exhibit a super-Nernstian response to pH similar to that observed for iridium oxide grown electrochemically on iridium substrates. The pH response is reproducible and remains stable over a period of several days. (C) 1998 Elsevier Science S.A. All rights reserved.
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收藏
页码：208 / 216
页数：9
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